title: The anaerobic oxidation of hydrazine: a novel reaction in microbial nitrogen metabolism.
abstract: Hydrazine is rarely found as an intermediate in microbial nitrogen conversions. In this study the conversion of hydrazine by the anaerobic ammonium oxidation (Anammox) culture, in which hydrazine has been proposed as an intermediate, was investigated. This study demonstrated the biological nature of hydrazine conversion by the Anammox culture. In batch cultures with hydrazine it was observed that 3 mol N2H4 was disproportionated to 4 mol NH4+ and 1 mol N2. Hydrazine with nitrite as an electron acceptor showed a conversion of 3 mol N2H4 and 4 mol NO2- to 5 mol N2, with a specific activity of 5.5 nmol min-1 (mg volatile suspended solids)-1. Addition of hydrazine to a biofilm reactor for 80 days showed that it was not possible to grow Anammox with hydrazine.
authors.affiliation: Kluyver Laboratory for Biotechnology, Delft University of Technology, The Netherlands.
authors.forename: J
authors.initials: J
authors.lastname: Schalk
authors.forename: H
authors.initials: H
authors.lastname: Oustad
authors.forename: J G
authors.initials: JG
authors.lastname: Kuenen
authors.forename: M S
authors.initials: MS
authors.lastname: Jetten
mesh_terms: D000421:Alcaligenes / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D000693:Anaerobiosis; D018441:Biofilms; D003470:Culture Media; D006834:Hydrazines / Q000378:metabolism* / Q000494:pharmacology; D009584:Nitrogen / Q000378:metabolism*; D010084:Oxidation-Reduction; D000644:Quaternary Ammonium Compounds / Q000378:metabolism / Q000494:pharmacology
chemical_list: D003470:Culture Media; D006834:Hydrazines; D000644:Quaternary Ammonium Compounds; C029424:hydrazine; D009584:Nitrogen